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refactor log

This commit is contained in:
siddontang 2014-04-06 22:09:23 +08:00
parent e009b5fbd8
commit ec6187efd9
3 changed files with 117 additions and 127 deletions
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110
log/handler.go
View File

@ -9,67 +9,34 @@ import (
type Handler interface {
Write(p []byte) (n int, err error)
Close()
}
type base struct {
msg chan []byte
quit chan bool
}
func (h *base) Write(p []byte) (n int, err error) {
m := make([]byte, len(p))
copy(m, p)
h.msg <- m
return len(p), nil
}
func (h *base) Close() {
h.quit <- true
Close() error
}
type StreamHandler struct {
base
w io.Writer
}
func NewStreamHandler(w io.Writer, msgNum int) (*StreamHandler, error) {
func NewStreamHandler(w io.Writer) (*StreamHandler, error) {
h := new(StreamHandler)
h.w = w
h.msg = make(chan []byte, msgNum)
h.quit = make(chan bool, 1)
go h.run()
return h, nil
}
func NewDefaultStreamHandler(w io.Writer) (*StreamHandler, error) {
return NewStreamHandler(w, 1024)
func (h *StreamHandler) Write(b []byte) (n int, err error) {
return h.w.Write(b)
}
func (h *StreamHandler) run() {
for {
select {
case m := <-h.msg:
h.w.Write(m)
case <-h.quit:
return
}
}
func (h *StreamHandler) Close() error {
return nil
}
type FileHandler struct {
base
fd *os.File
}
func NewFileHandler(fileName string, flag int, msgNum int) (*FileHandler, error) {
func NewFileHandler(fileName string, flag int) (*FileHandler, error) {
f, err := os.OpenFile(fileName, flag, 0)
if err != nil {
return nil, err
@ -79,36 +46,21 @@ func NewFileHandler(fileName string, flag int, msgNum int) (*FileHandler, error)
h.fd = f
h.msg = make(chan []byte, msgNum)
h.quit = make(chan bool, 1)
go h.run()
return h, nil
}
func NewDefaultFileHandler(fileName string, flag int) (*FileHandler, error) {
return NewFileHandler(fileName, flag, 1024)
func (h *FileHandler) Write(b []byte) (n int, err error) {
return h.fd.Write(b)
}
func (h *FileHandler) run() {
for {
select {
case m := <-h.msg:
h.fd.Write(m)
case <-h.quit:
h.fd.Close()
return
}
}
func (h *FileHandler) Close() error {
return h.fd.Close()
}
//refer: http://docs.python.org/2/library/logging.handlers.html
//same like python TimedRotatingFileHandler
type TimeRotatingFileHandler struct {
base
fd *os.File
baseName string
@ -124,7 +76,7 @@ const (
WhenDay
)
func NewTimeRotatingFileHandler(baseName string, when int8, interval int, msgNum int) (*TimeRotatingFileHandler, error) {
func NewTimeRotatingFileHandler(baseName string, when int8, interval int) (*TimeRotatingFileHandler, error) {
h := new(TimeRotatingFileHandler)
h.baseName = baseName
@ -143,8 +95,7 @@ func NewTimeRotatingFileHandler(baseName string, when int8, interval int, msgNum
h.interval = 3600 * 24
h.suffix = "2006-01-02"
default:
e := fmt.Errorf("invalid when_rotate: %d", when)
panic(e)
return nil, fmt.Errorf("invalid when_rotate: %d", when)
}
h.interval = h.interval * int64(interval)
@ -152,23 +103,15 @@ func NewTimeRotatingFileHandler(baseName string, when int8, interval int, msgNum
var err error
h.fd, err = os.OpenFile(h.baseName, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
if err != nil {
panic(err)
return nil, err
}
fInfo, _ := h.fd.Stat()
h.rolloverAt = fInfo.ModTime().Unix() + h.interval
h.msg = make(chan []byte, msgNum)
h.quit = make(chan bool, 1)
go h.run()
return h, nil
}
func NewDefaultTimeRotatingFileHandler(baseName string, when int8, interval int) (*TimeRotatingFileHandler, error) {
return NewTimeRotatingFileHandler(baseName, when, interval, 1024)
}
func (h *TimeRotatingFileHandler) doRollover() {
//refer http://hg.python.org/cpython/file/2.7/Lib/logging/handlers.py
now := time.Now()
@ -187,22 +130,11 @@ func (h *TimeRotatingFileHandler) doRollover() {
}
}
func (h *TimeRotatingFileHandler) run() {
for {
select {
case m := <-h.msg:
h.doRollover()
if h.fd != nil {
_, e := h.fd.Write(m)
if e != nil {
panic(e)
}
}
case <-h.quit:
if h.fd != nil {
h.fd.Close()
}
return
}
}
func (h *TimeRotatingFileHandler) Write(b []byte) (n int, err error) {
h.doRollover()
return h.fd.Write(b)
}
func (h *TimeRotatingFileHandler) Close() error {
return h.fd.Close()
}

132
log/log.go
View File

@ -2,8 +2,9 @@ package log
import (
"fmt"
"log"
"os"
"runtime"
"time"
)
const (
@ -15,45 +16,72 @@ const (
LevelFatal
)
const (
Ltime = iota << 1 //time format "2006/01/02 15:04:05"
Lfile //file.go:123
Llevel //[Trace|Debug|Info...]
)
var LevelName [6]string = [6]string{"Trace", "Debug", "Info", "Warn", "Error", "Fatal"}
type Logger struct {
logger *log.Logger
level int
handler Handler
}
const TimeFormat = "2006/01/02 15:04:05"
const (
Ldate = log.Ldate
Ltime = log.Ltime
Lmicroseconds = log.Lmicroseconds
Llongfile = log.Llongfile
Lshortfile = log.Lshortfile
LstdFlags = Ldate | Ltime
)
type Logger struct {
level int
flag int
handler Handler
quit chan struct{}
msg chan []byte
}
func New(handler Handler, flag int) *Logger {
var l = new(Logger)
l.logger = log.New(handler, "", flag) //log.LstdFlags|log.Lshortfile)
l.level = LevelInfo
l.handler = handler
l.flag = flag
l.quit = make(chan struct{})
l.msg = make(chan []byte, 1024)
go l.run()
return l
}
func NewDefault(handler Handler) *Logger {
return New(handler, log.LstdFlags|log.Lshortfile)
return New(handler, Ltime|Lfile|Llevel)
}
func newStdHandler() *StreamHandler {
h, _ := NewDefaultStreamHandler(os.Stdout)
h, _ := NewStreamHandler(os.Stdout)
return h
}
var std = NewDefault(newStdHandler())
func (l *Logger) run() {
for {
select {
case msg := <-l.msg:
l.handler.Write(msg)
case <-l.quit:
l.handler.Close()
}
}
}
func (l *Logger) Close() {
l.handler.Close()
if l.quit == nil {
return
}
close(l.quit)
l.quit = nil
}
func (l *Logger) SetLevel(level int) {
@ -61,39 +89,69 @@ func (l *Logger) SetLevel(level int) {
}
func (l *Logger) Output(callDepth int, level int, format string, v ...interface{}) {
if l.level <= level {
f := fmt.Sprintf("[%s] %s", LevelName[level], format)
s := fmt.Sprintf(f, v...)
l.logger.Output(callDepth, s)
if l.level > level {
return
}
}
func (l *Logger) Write(s string) {
l.logger.Output(3, s)
buf := make([]byte, 0, 1024)
if l.flag&Ltime > 0 {
now := time.Now().Format(TimeFormat)
buf = append(buf, now...)
buf = append(buf, " "...)
}
if l.flag&Lfile > 0 {
_, file, line, ok := runtime.Caller(callDepth)
if !ok {
file = "???"
line = 0
} else {
for i := len(file) - 1; i > 0; i-- {
if file[i] == '/' {
file = file[i+1:]
break
}
}
}
buf = append(buf, fmt.Sprintf("%s:%d ", file, line)...)
}
if l.flag&Llevel > 0 {
buf = append(buf, fmt.Sprintf("[%s] ", LevelName[level])...)
}
s := fmt.Sprintf(format, v...)
buf = append(buf, s...)
buf = append(buf, "\n"...)
l.msg <- buf
}
func (l *Logger) Trace(format string, v ...interface{}) {
l.Output(3, LevelTrace, format, v...)
l.Output(2, LevelTrace, format, v...)
}
func (l *Logger) Debug(format string, v ...interface{}) {
l.Output(3, LevelDebug, format, v...)
l.Output(2, LevelDebug, format, v...)
}
func (l *Logger) Info(format string, v ...interface{}) {
l.Output(3, LevelInfo, format, v...)
l.Output(2, LevelInfo, format, v...)
}
func (l *Logger) Warn(format string, v ...interface{}) {
l.Output(3, LevelWarn, format, v...)
l.Output(2, LevelWarn, format, v...)
}
func (l *Logger) Error(format string, v ...interface{}) {
l.Output(3, LevelError, format, v...)
l.Output(2, LevelError, format, v...)
}
func (l *Logger) Fatal(format string, v ...interface{}) {
l.Output(3, LevelFatal, format, v...)
l.Output(2, LevelFatal, format, v...)
}
func SetLevel(level int) {
@ -101,25 +159,25 @@ func SetLevel(level int) {
}
func Trace(format string, v ...interface{}) {
std.Output(3, LevelTrace, format, v...)
std.Output(2, LevelTrace, format, v...)
}
func Debug(format string, v ...interface{}) {
std.Output(3, LevelDebug, format, v...)
std.Output(2, LevelDebug, format, v...)
}
func Info(format string, v ...interface{}) {
std.Output(3, LevelInfo, format, v...)
std.Output(2, LevelInfo, format, v...)
}
func Warn(format string, v ...interface{}) {
std.Output(3, LevelWarn, format, v...)
std.Output(2, LevelWarn, format, v...)
}
func Error(format string, v ...interface{}) {
std.Output(3, LevelError, format, v...)
std.Output(2, LevelError, format, v...)
}
func Fatal(format string, v ...interface{}) {
std.Output(3, LevelFatal, format, v...)
std.Output(2, LevelFatal, format, v...)
}

2
log/log_test.go
View File

@ -6,7 +6,7 @@ import (
)
func TestStdStreamLog(t *testing.T) {
h, _ := NewDefaultStreamHandler(os.Stdout)
h, _ := NewStreamHandler(os.Stdout)
s := NewDefault(h)
s.Info("hello world")